Google Password Manager not available for Credential Exchange import on Android

I am unable to import passwords from Google Password Manager into 1Password on Android - other than using CSV route which I dont want to do

Pixel 11 Pro, Android 17
Google Play Services 26.36.33
1Password 8.12.38

1Password → New Item → Migrate data into 1Password does not list Google Password Manager as a source.

Google announced Google Password Manager ↔ 1Password Credential Exchange support on September 10. Is Google Password Manager → 1Password currently supported in 8.12.38, or is this functionality still rolling out?